Estimation of Pubertal Growth Spurt Parameters in Children and Adolescents Living at Moderate Altitude in Colombia oleh Marco Antonio Cossio-Bolaños, Ruben Vidal-Espinoza, Juan Minango-Negrete, Pedro R. Olivares, Pedro R. Olivares, Luis Urzua-Alul, Luis Felipe Castelli Correia de Campos, Jose Fuentes-López, Lucila Sanchez-Macedo, Edilberto Diaz-Bonilla, Claudia Torres-Galvis, Rossana Gomez-Campos